MOcen Posted September 29, 2014 Share Posted September 29, 2014 Dear All, Please advise me the best and correct way to do a hard ECU Reset on My Subaru Forester SF5 Model 2000 Automatic Transmission. Regards, Micheal. Quote Link to comment Share on other sites More sharing options...
idosubaru Posted September 29, 2014 Share Posted September 29, 2014 in US market Subaru's it's simply just disconnecting the battery over night. that era subaru is very simple, not much to it. Quote Link to comment Share on other sites More sharing options...
Prwa101 Posted September 29, 2014 Share Posted September 29, 2014 ^ works every time. But I've even don't it for 15-30min off the battery and I worked. Prwa 1 Quote Link to comment Share on other sites More sharing options...
Rooster2 Posted September 29, 2014 Share Posted September 29, 2014 Disconnecting the battery for a half hour is also a good way to clear a CEL. 1 Quote Link to comment Share on other sites More sharing options...
MOcen Posted September 30, 2014 Author Share Posted September 30, 2014 How long should the car idle after i put back the battery? Do i step on the gas pedal immediately or i wait for the ECU to pick up the new settings and normalise. I appreciate all the advise. Thanks, Micheal. Quote Link to comment Share on other sites More sharing options...
Fairtax4me Posted September 30, 2014 Share Posted September 30, 2014 Need to let it idle for about ten minutes at the minimum. It's better to wait until the radiator fans cycle once. Don't touch the throttle, let the ECU make its own adjustments. If it stalls just restart the engine and let it idle. After the fans cycle turn it off and let it cool for about an hour. Then start it and let it idle again for 3-5 minutes. Just long enough for it to come down from the high warm-up idle. Then take it for a drive about 15-30 minutes at varying speeds. Quote Link to comment Share on other sites More sharing options...
nipper Posted October 1, 2014 Share Posted October 1, 2014 I just always wated 15 minutes then started the car, dealt with a stall, restarted and drove. What is happening with a hard reset is not only your clearing the codes (that only takes a minute) but you have erased everything it has learned about you, from your lead fooded starts to how you like to sneak off to the donut shop when you say your going for a run. 1 Quote Link to comment Share on other sites More sharing options...
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